A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. It may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. It is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. See window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.
Classification: Articles of plastics & articles of other materials of heading 3901 to 3914, nesoi
NSN 5985-01-286-2192
NSN 6150-00-765-1527
NSN 6145-01-452-0021
NSN 5985-01-287-1647
NSN 4140-01-439-0350
NSN 6685-01-432-0265
NSN 5855-00-763-2155
NSN 5996-00-967-2406
NSN 6645-00-816-1707
NSN 5985-00-226-6846
NSN 5935-00-018-6515
NSN 6145-00-753-2264